docs: def get_proxy_for_requests(self, url):
          """
          Get proxy configuration for a given URL, in a form ready to use with the Requests library.
  
          :param str url: The URL for which to obtain proxy configuration.
          :returns: Proxy configuration in a form recognized by Requests, for use with the ``proxies`` parameter.
          :rtype: dict
          :raises ProxyConfigExhaustedError: If no proxy is configured or available,
              and 'DIRECT' is not configured as a fallback.
          """
          proxy = self.get_proxy(url)
          if not proxy:
              raise ProxyConfigExhaustedError(url)
          return proxy_parameter_for_requests(proxy)